Human Anatomy & Physiology
1st Edition
ISBN: 9780805382952
Author: Erin C. Amerman
Publisher: PEARSON
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Textbook Question
Chapter 2.4, Problem 2QC
Which molecules are likely to be hydrophilic? Which are likely to be hydrophobic?
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Which is an appropriate statement of involvement of the hydrophobic effect in
protein folding?
A) Nonpolar portions interact with polar portions in the interior of the protein.
O
B) Nonpolar portions of the molecule associate with one another in the interior
of the protein.
OC) Nonpolar portions of the molecule can be placed on the surface of the
molecule only if hydrogen bonded to water.
OD) Polar portions of the molecule are generally exposed to solvent to interact
effectively with water.
What are hydrophobic molecules (or hydrophobic molecular regions)? What are hydrophilic molecules? How can they be characterized in relation to their polarity?
Explain the meaning of the terms polar and nonpolar; hydrophilic and hydrophobic.
Chapter 2 Solutions
Human Anatomy & Physiology
Ch. 2.1 - Prob. 1QCCh. 2.1 - What are atoms?Ch. 2.1 - How do the three types of subatomic particles...Ch. 2.1 - What is an element?Ch. 2.1 - 4. How are elements arranged in the periodic...Ch. 2.1 - What are isotopes?Ch. 2.1 - Prob. 1AWYLCh. 2.1 - The element lithium has an atomic number of 3 and...Ch. 2.2 - What is a mixture?Ch. 2.2 - 2. How do the three types of mixtures differ?
Ch. 2.2 - Prob. 3QCCh. 2.2 - What is an ionic bond?Ch. 2.2 - 5. How is an ionic bond formed?
Ch. 2.2 - 6. Explain how polar and nonpolar covalent bonds...Ch. 2.2 - What are hydrogen bonds? Why do hydrogen bonds...Ch. 2.2 - Which would be more reactive-an atom of fluorine...Ch. 2.2 - Would a molecule of hydrogen (H2) form hydrogen...Ch. 2.2 - Explain why the molecule Na2 does not exist in...Ch. 2.3 - Prob. 1QCCh. 2.3 - Prob. 2QCCh. 2.3 - How do endergonic and exergonic reactions differ?Ch. 2.3 - Prob. 4QCCh. 2.3 - What factors can influence the rate of a chemical...Ch. 2.3 - 6. What is an enzyme, and what does an enzyme do?
Ch. 2.3 - Prob. 1AWYLCh. 2.3 - Explain why most biological molecules are stable...Ch. 2.3 - 3. Many naturally occurring poisons function by...Ch. 2.4 - What are four properties of water that make it a...Ch. 2.4 - 2. Which molecules are likely to be hydrophilic?...Ch. 2.4 - 3. Define the terms acid and base.
Ch. 2.4 - What is the pH scale? Which pH values are...Ch. 2.4 - What is the effect of a buffer on a solution?Ch. 2.4 - What is a salt?Ch. 2.4 - 7. What does an electrolyte do in a solution?
Ch. 2.4 - Explain how the water surrounding a fetus in the...Ch. 2.4 - Prob. 2AWYLCh. 2.5 - 1. How do polymers and monomers differ?
Ch. 2.5 - 2.3. How do monosaccharides, disaccharides, and...Ch. 2.5 - 2. How do monosaccharides, disaccharides, and...Ch. 2.5 - How are two monosaccharides linked to form a...Ch. 2.5 - Prob. 5QCCh. 2.5 - 5. How do phospholipids and triglycerides differ?
Ch. 2.5 - What are steroids?Ch. 2.5 - Prob. 8QCCh. 2.5 - How are amino acids linked to form peptides and...Ch. 2.5 - What are the four levels of structural...Ch. 2.5 - 10. What are the components and roles of ATP?
Ch. 2.5 - 11. How do DNA and RNA differ?
Ch. 2.5 - 11. What are the three components of a...Ch. 2.5 - Which molecule would be the most soluble in water:...Ch. 2.5 - In Module 2.3, you learned that increasing...Ch. 2.5 - 3. How could a defect in a gene lead to a...Ch. 2 - Prob. 1CYRCh. 2 - Fill in the blanks: Isotopes are atoms with the...Ch. 2 - 3. Which of the following statements correctly...Ch. 2 - 4. Explain the difference between an ionic and a...Ch. 2 - Identify each of the following molecules or...Ch. 2 - What are hydrogen bonds, and how do they form?Ch. 2 - Prob. 7CYRCh. 2 - Prob. 8CYRCh. 2 - Which of the following would not result in an...Ch. 2 - 10. An enzyme is a:
a. biological catalyst that...Ch. 2 - Prob. 11CYRCh. 2 - With respect to their solubility in water,...Ch. 2 - Mark the following statements as true or false. If...Ch. 2 - A salt is: a. a metal cation bonded to a nonmetal...Ch. 2 - 15. Compare and contrast the structures of...Ch. 2 - 16. Mark the following statements as true or...Ch. 2 - 17. Why is it important for a protein to maintain...Ch. 2 - Which of the following is not part of a...Ch. 2 - 19. Mark the following properties as belonging to...Ch. 2 - Which of the following statements is/are true...Ch. 2 - 1. In certain types of radioactive decay, the...Ch. 2 - Considering that water is a main component of the...Ch. 2 - 3. Explain why monosaccharides are polar and fatty...Ch. 2 - 1. The polysaccharide cellulose is not digestible...Ch. 2 - Some claim that the pH of your blood can be...Ch. 2 - Prob. 3AYKCh. 2 - Prob. 5AYKCh. 2 - You have just dropped some phospholipids into...
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- Which noncovalent interactions (discussed in Section 8.2) are responsible for the cohesion of lipid molecules? Is the overall strength of these forces weak or strong? Why are lipids incompatible with water?arrow_forwardWhich part of an amphipathic lipid is the hydrophobic part?arrow_forwardWhat is the relationship between polarity and hydrophobicity?arrow_forward
- The most important contribution to the stability of a globular protein's conformation appears to be the: a.) entropy increase from the decrease in ordered water molecules forming a solvent shell around it. b.) maximum entropy increase from ionic interactions between the ionized amino acids in a protein. c.) sum of free engeries of formation of may weak interactions between its polar amino acids and surrounding water.arrow_forwardDescribe how lipids with hydrophilic and hydrophobic regions behave in an aqueous environment.arrow_forwardDescribe the properties of three different types of lipid molecules. What are their respective biological roles?arrow_forward
- Is the cell membrane in Bacteria consists of ester-linked lipids?arrow_forwardWhat type(hydrophilic, hydrophobic, acid, base) side chains might be attracted to each other? What type(hydrophilic, hydrophobic, acid, base) side chains might repel each other?arrow_forwardDo peptide bonds get protonated or deprotonated? Explainarrow_forward
- Disulfide bonds help to stabilize the three-dimensional structure of proteins. What amino acids are involved in the formation of disulfide bonds? Does the formation of a disulfide bond increase or decrease entropy (ΔS)?arrow_forwardAt what level of protein structure do multiple polypeptide chains interact?arrow_forwardA phospholipid is a biomolecule composed of a phosphate group that is bonded to two lipid chains. Which of the following correctly describes the nature of those two components? (a) The phosphate group is hydrophobic, and the lipid chains are hydrophilic. (b) Both the phosphate group and the lipid chains are hydrophilic. (c) Both the phosphate group and the lipid chains are hydrophobic. (d) The phosphate group is hydrophilic, and the lipid chains are hydrophobic.arrow_forward
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